Some solutions for n=4
..0..1..1..1..0....0..1..0..0..0....0..1..0..0..0....0..0..1..0..2
..2..2..3..2..3....1..1..1..0..2....1..1..1..0..3....1..2..1..3..2
..3..0..0..0..1....3..1..2..1..0....2..1..2..1..0....0..3..0..0..2
..3..1..1..2..1....1..2..2..2..1....2..2..2..2..1....1..1..1..1..1
..3..0..3..0..3....0..1..2..0..2....0..2..0..2..2....2..2..2..2..0
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